JBL 4344 MKII Owner's Manual

Also see for Professional Series: Technical manual Technical manual

Contents

JBL 4344 MKII Owner's Manual Manual pdf 10 page image

The 4344MkII’s outer connection panel and internal dividingnetwork are designed so that separate sets of speaker cable can be attachedto the low-frequency transducer and midrange/high-frequency transducerportions of the dividing network. This is called bi-wiring. Bi-wiring canprovide several sonic advantages and considerably more flexibility inpower amplifier selection. The advantages of bi-wiring are as follows:The majority of current flowing between an amplifier and speaker is devotedto bass reproduction. In fact, 60% or more of an amplifier’s output is des-tined for the woofers. When current flows through a wire, it produces anelectro-magnetic field (EMF) that expands and collapses at a rate equal tothat of the music’s complex frequency components. If a single speakerwire must conduct the full musical frequency, the preponderance of low-frequency information can interact with or modulate high frequencies.The resulting intermodulation can create audible changes to the highfrequencies even before they reach the loudspeakers.By using separate cables for high and low frequencies, unwanted high-frequency modulation is avoided. Low-frequency information flowsthrough one cable while high frequencies flow through another.Having the opportunity to use separate low- and high-frequency cablesallows you to use cables best suited to each frequency range. Optimally,you should use high-quality, audiophile-grade speaker cables for both low-and high-frequency conductors. However, let your ears guide you to thecables that best match the 4344MkII loudspeakers to your amplifier.Bi-wiring also allows you the option of using separate stereo poweramplifiers for left and right speakers, or even four mono amplifiers.Whether you use two or four amplifiers, it is important to use the samebrand and model to power like connections on the 4344MkII.Frequency-optimized CablesNo.10Reduction of IntermodulationBi-WiringAmplifier Flexibility4344 MK 11 Manual 7/21/98 3:18 PM Page 9